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915.3 Location of detection devices. Carbon monoxide detection devices shall be installed <br />in accordance with manufacturer's instructions in a location that avoids dead air <br />soaces turbulent airs aces fresh air returns o en windows and obstructions that <br />would inhibit accumulation of carbon monoxide at the detection location. Carbon <br />monoxide detection in air ducts or lenums shall not be ermitted as an alternative <br />to re uired detection locations. <br />915.4 Permissible detection devices. Carbon monoxide detection shall be )rovided b_y a <br />carbon monoxide detections stem com I in with Section 915.4.2 unless carbon <br />monoxide alarms are ermitted b Sections 915.4.1. <br />915.4.1 Carbon monoxide alarms. Carbon monoxide alarms complADA with Sections, <br />915.4.1.1 throu h 915.4.1.3 shall be permitted in lieu of a carbon monoxide <br />detection system in both of the followin <br />1. DweI rin units and Slee yin units. <br />2. Locations other than dwelling units or Slee in units where approved <br />rovided that the <br />manufacturer's instructions do not prohibit installation in locations other than dwelling <br />units or sleeicin units and that the alarm si nal for an carbon monoxide alarm <br />installed in a normally unoccu ied location is annunciated by an audible and visual <br />si nal in an a roved location. <br />915.4.1.1 Power source. In buildings with a wired power source carbon monoxide alarms, <br />shall receive their ° rimar ower from a permanent connection to building wirin , <br />with no disconnectin means other than for overcurrent rotection and shall be <br />rovided with a batter backu . In buildin s without a wired ower source, carbon, <br />monoxide alarms shall be battery powered. <br />Exce tion: For existin <br />buildings not previously re uired to have carbon monoxide alarms <br />ermanentl connected to a wired „ower source. existin batter „- owered and lu - <br />in with batter backupcarbon monoxide alarms shall be ermitted to remain in service. <br />When raced, re lacement with batter - owered and�lu -in with batter backu <br />carbon monoxide alarms shall be permitted. <br />915.4.1.2 Listin s. Carbon monoxide alarms shall be listed in accordance with UL 2034. <br />Combination carbon monoxide smoke alarms shall also be listed in accordance with <br />UL 217. <br />915.4.1.3 Interconnection. Where more than one carbon monoxide „alarm is installed <br />actuation of anv alarm shall cause all of the alarms to signal an alarm condition. <br />915.4.2 Carbon monoxide detections stems. Carbon monoxide detection s stems shall <br />be installed in accordance with NFPA 72. <br />